Used primarily in pharmaceutical research and development, this compound serves as a stable isotope-labeled internal standard in mass spectrometry-based assays. It aids in the accurate quantification of omeprazole and its metabolites in biological samples, ensuring precision in pharmacokinetic and metabolic studies. Its application is crucial for optimizing drug formulations, understanding drug interactions, and ensuring compliance with regulatory standards in drug testing. Additionally, it supports clinical trials by providing reliable data on drug absorption, distribution, metabolism, and excretion.